Low emission U-fired boiler combustion system

Title: Low emission U-fired boiler combustion system

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Abstract

At least one main combustion chamber contains at least one pulverized coal burner. Each pulverized coal burner is operatively arranged for minimizing NO.sub.X production and for maintaining a predetermined operating temperature to liquefy ash within the combustion chamber. The combustion chamber includes a slag drain for removing slag from the combustion chamber. A slag screen is positioned in a generally U-shaped furnace flow pattern. The slag screen is positioned between the combustion chamber and a radiant furnace. The radiant furnace includes a reburning zone for in-furnace No.sub.X reduction. The reburning zone extends between a reburning fuel injection source and at least one overfire air injection port for injecting air.

Inventors:

Ake, Terence ^[1]; Beittel, Roderick ^[2]; Lisauskas, Robert A ^[3]; Reicker, Eric ^[4]

North Brookfield, MA
Worcester, MA
Shrewsbury, MA
Barre, MA

Issue Date:: 2000-01-01

Research Org.:: RILEY STOKER CORP

OSTI Identifier:: 872985

Patent Number(s):: 6058855

Assignee:: D. B. Riley, Inc. (Worcester, MA)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23D - BURNERS

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F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR
F23C3/00 - Combustion apparatus characterised by the shape of the combustion chamber
F23C7/006 - {adjustable}
F23C2201/101 - in vertical direction, e.g. alternating lean and rich zones

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23D - BURNERS
F23D1/00 - Burners for combustion of pulverulent fuel
F23D2201/20 - Fuel flow guiding devices

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR
F23C9/06 - for completing combustion
F23C2201/301 - with different fuels in stages

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23D - BURNERS
F23D17/00 - Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR
F23C6/042 - {with fuel supply in stages

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23L - SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL
F23L9/04 - by discharging the air beyond the fire, i.e. nearer the smoke outlet

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DOE Contract Number:: AC22-92PC92158

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: emission; u-fired; boiler; combustion; main; chamber; contains; pulverized; coal; burner; operatively; arranged; minimizing; production; maintaining; predetermined; operating; temperature; liquefy; ash; slag; drain; removing; screen; positioned; u-shaped; furnace; flow; pattern; radiant; reburning; zone; in-furnace; reduction; extends; fuel; injection; source; overfire; air; injecting; chamber contains; burning zone; pulverized coal; combustion chamber; operating temperature; fuel injection; main combustion; coal burner; flow pattern; injecting air; air injection; /110/

Citation Formats


                    Ake, Terence, Beittel, Roderick, Lisauskas, Robert A, and Reicker, Eric. Low emission U-fired boiler combustion system.  United States: N. p., 2000. 
        Web.

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                    Ake, Terence, Beittel, Roderick, Lisauskas, Robert A, & Reicker, Eric. Low emission U-fired boiler combustion system.  United States.

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                    Ake, Terence, Beittel, Roderick, Lisauskas, Robert A, and Reicker, Eric. Sat .  
        "Low emission U-fired boiler combustion system".  United States.  https://www.osti.gov/servlets/purl/872985.

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@article{osti_872985,

  title        = {Low emission U-fired boiler combustion system},

  author       = {Ake, Terence and Beittel, Roderick and Lisauskas, Robert A and Reicker, Eric},

  abstractNote = {At least one main combustion chamber contains at least one pulverized coal burner. Each pulverized coal burner is operatively arranged for minimizing NO.sub.X production and for maintaining a predetermined operating temperature to liquefy ash within the combustion chamber. The combustion chamber includes a slag drain for removing slag from the combustion chamber. A slag screen is positioned in a generally U-shaped furnace flow pattern. The slag screen is positioned between the combustion chamber and a radiant furnace. The radiant furnace includes a reburning zone for in-furnace No.sub.X reduction. The reburning zone extends between a reburning fuel injection source and at least one overfire air injection port for injecting air.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2000},

  month        = {1}

}

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